The file I was speaking of is also called Virtual Memory, and is found under Control Panel > System > Advanced > Performance > Settings> Advanced > Virtual Memory... 

The Page, or Virtual Memory for your system is shown here. This should not be confused with the scratch or spool files for your programs. Windows arbitrarily limits this file space between 2 and 4092 K of space.

Your system should be able to handle it. I only have 2.75 G of ram on each of my liquid cooled Core(TM)2 Duo's, running nine RAID Drives in an array of 3 logical drives, and have never had this sort of problem.

Check to make sure your fans (if any) are running, you have plenty of ventilation room, and your case isn't full of dust.

You may want to contact the manufacturer if you have a band name. Otherwise, if its a home built unit, I would suggest to have each of your boards, motherboard and video card, checked out on line to see what the trouble might be. 

Yank My Doodle, It's a Dandy!